Ogre is known as The God of
Fighting by the ancient Aztecs... a weapon of war left on earth by aliens in
ancient times. He has the ability to absorb souls (and consume their fighting
abilities) to increase his power. It states that many
years after Heihachi had reclaimed
control of the Mishima Zaibatsu, he formed the Tekken Force, his own military
group. One of the missions of the Tekken Force was to search an ancient temple
located somewhere in Mexico. Soon after arriving there, Heihachi learned that
his entire force had been obliterated by Ogre. Heihachi, having witnessed the
power of Ogre sought to capture it in hopes of creating the ultimate life form.

Ogre attacked many
world-renowned martial arts masters around the world. Because many characters
from previous Tekken titles were not featured in, it is believed that their
disappearance is due to being a victim of Ogre. This is supported by the fact
that Ogre's fighting style is completely formed by other character's fighting
styles, many of which were those who did not appear among the cast of playable
characters in Tekken 3, such as Wang
Jinrei, Baek
Doo San, Bruce
Irvin, Lee
Chaolan, and Kunimitsu.
It was later revealed however, that the only Tekken fighters that Ogre
attacked/killed were Baek Doo San (whom he didn't succeed in killing), the original King,
and Jun Kazama.

Sometime when Jin was
fifteen, his mother warned him of an approaching evil (Ogre) and told him to
seek refuge with his grandfather, Heihachi. Jin,
wishing to protect his mother tried to defend her from Ogre, but was knocked
unconscious. When Jin awoke, he found his home burned to the ground and his
mother nowhere to be seen. It is unknown if Ogre actually killed Jun. It is
rumored that Jun was taken to the demon world by Devil Kazuya so that Ogre could
not find her, but Jin is unaware. Jin fled to his
grandfather, Heihachi, as Jun had previously instructed. Heihachi made the
decision to train the boy to become a powerful fighter, giving Jin hopes of
extracting revenge on Ogre. Heihachi's goal however, was to make Jin powerful
enough to lure Ogre to him.

Eventually, Heihachi
announced the King of Iron Fist Tournament 3 as a way to attract many powerful
fighters. As planned, Ogre appeared at the tournament, but he was defeated by Paul
Phoenix (Explained in Paul's Tekken 4 prologue) before Heihachi could
capture it. Also, Jin, presumably having discovered Heihachi's sinister
intentions for the tournament, defeated Heihachi. Unknown to them however, Ogre
was not killed, and morphed into a monstrous beast (True
Ogre) by absorbing the energy of
Heihachi.

Ogre's second form
(known as True Ogre in subsequent games), is capable of using all of its
techniques from his previous form as well as the abilities to teleport, fly, and
breathe fire. True Ogre was defeated by Jin, and a white orb of light was
emitted from its body as it dissolved.

Although Ogre was not
present in the game, he appears briefly in Heihachi's prologue. This explains
that, Heihachi devised a new plan to make himself the ultimate warrior by using
the genes of Ogre that were collected after the fight with Jin. But Ogre's
genome could only be integrated with the "Devil Gene", which Heihachi
did not possess. He knew that Jin and the resurrected Kazuya did, so he
announced The King of Iron Fist Tournament 4 to lure both of them out.

Ogre was a
badass boss in Tekken 3 and had a pretty cool fighting style, although many
of his moves were
borrowed from other characters' movesets. Visually, he's a naturally intriguing, original
design. He doesn't exactly fit in with the
"more realistic" fighters of Tekken, but that's what makes him
stand out as a boss I suppose.

After TTT1, Ogre was absent for about 13 years I think (real life years).
Finally in 2012, Capcom reintroduced Ogre to the genre in SFXT, giving
their "unique" interpretation of the design. As a boss of SFXT, Ogre was a fitting choice...
but I'm not much a fan of Ogre's SFXT incarnation/moveset, even though he did
turn out better than some other Tekken characters did in SFXT. Thankfully, Ogre made his
true return in Tekken Tag 2 as a console exclusive character. Namco did a
great job with hi updated moveset and really breathed new life into the
character visually. Ogre still shares many moves from other fighters in TTT2, but that's
actually part of his design in terms of story (and a distinguishable part of his
original design, mind you)! Ogre also brought back some "old
school" animations in TTT2, which is actually a fan service for veteran players.